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Scales of Electronegativity

Estimate the ...

Question

Estimate the percent ionic character of the $H B r$ molecule, given that the dipole moment $(μ)$ is $0.79 D$ and $H B r$ bond length $151$ pm.

10.9

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8.2

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Solution

The correct option is A $10.9$
Calculate value of $μ = e \times l$
$= 4.8 \times 10^{- 10} e s u \times 1.51 \times 10^{- 10} c m$
$= 7.248 \times 10^{- 18} e s u c m$
$(1 \times 10^{- 18} e s u - c m = 1 D e b y e) = 7.248 D e b y e$
Observed value of $μ = \frac{o b s e r v e d v a l u e \times 1000}{c l c u l a t e v a l u e}$
$= \frac{0 .79}{7.248} \times 100$
$= 10.9$ %

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